uv 0.12.9

0.12.9
Added 2
  • Add CPython 3.15.0rc2
  • Add `--no-locked` and `--no-frozen` flags to disable lock modes enabled by `UV_LOCKED` and `UV_FROZEN` for a single invocation
Changed 2
  • Report the exact command-line lock-mode flag in warnings and errors
  • Speed up cold wheel installs by extracting each streaming ZIP archive in a single blocking task and reusing buffers across files
Fixed 5
  • Update `async_http_range_reader` to 0.11.1 to address a potential memory-safety issue when reading metadata ranges from untrusted wheels
  • Remove sensitive headers when redirects cross authentication realms, including same-host redirects that change URL schemes
  • Redact secrets in signed URLs from retry diagnostics, including nested request errors
  • Give `--locked`, `--frozen`, `--check`, and `--check-exists` precedence over conflicting `UV_LOCKED` and `UV_FROZEN` values
  • Prevent concurrent uv processes from redundantly extracting the same local or source-built wheel

From uv

Release Notes

Released on 2026-09-01.

Python
Enhancements
  • Add --no-locked and --no-frozen to disable lock modes enabled by UV_LOCKED and UV_FROZEN for a single invocation (#21408)
  • Report the exact command-line lock-mode flag in warnings and errors (#21402)
Performance
  • Speed up cold wheel installs by extracting each streaming ZIP archive in a single blocking task and reusing buffers across files (#21372)
Bug fixes
  • Update async_http_range_reader to 0.11.1 to address a potential memory-safety issue when reading metadata ranges from untrusted wheels (#21401)
  • Remove sensitive headers when redirects cross authentication realms, including same-host redirects that change URL schemes (#21382)
  • Redact secrets in signed URLs from retry diagnostics, including nested request errors (#21381)
  • Give --locked, --frozen, --check, and --check-exists precedence over conflicting UV_LOCKED and UV_FROZEN values (#21396)
  • Prevent concurrent uv processes from redundantly extracting the same local or source-built wheel (#21400)
Install uv 0.12.9
Install prebuilt binaries via shell script
curl --proto '=https' --tlsv1.2 -LsSf https://releases.astral.sh/github/uv/releases/download/0.12.9/uv-installer.sh | sh
Install prebuilt binaries via powershell script
powershell -ExecutionPolicy Bypass -c "irm https://releases.astral.sh/github/uv/releases/download/0.12.9/uv-installer.ps1 | iex"
Download uv 0.12.9
FilePlatformChecksum
uv-aarch64-apple-darwin.tar.gzApple Silicon macOSchecksum
uv-x86_64-apple-darwin.tar.gzIntel macOSchecksum
uv-aarch64-pc-windows-msvc.zipARM64 Windowschecksum
uv-i686-pc-windows-msvc.zipx86 Windowschecksum
uv-x86_64-pc-windows-msvc.zipx64 Windowschecksum
uv-aarch64-unknown-linux-gnu.tar.gzARM64 Linuxchecksum
uv-i686-unknown-linux-gnu.tar.gzx86 Linuxchecksum
uv-powerpc64le-unknown-linux-gnu.tar.gzPPC64LE Linuxchecksum
uv-riscv64gc-unknown-linux-gnu.tar.gzRISCV Linuxchecksum
uv-s390x-unknown-linux-gnu.tar.gzS390x Linuxchecksum
uv-x86_64-unknown-linux-gnu.tar.gzx64 Linuxchecksum
uv-armv7-unknown-linux-gnueabihf.tar.gzARMv7 Linuxchecksum
uv-aarch64-unknown-linux-musl.tar.gzARM64 MUSL Linuxchecksum
uv-i686-unknown-linux-musl.tar.gzx86 MUSL Linuxchecksum
uv-riscv64gc-unknown-linux-musl.tar.gzRISCV MUSL Linuxchecksum
uv-x86_64-unknown-linux-musl.tar.gzx64 MUSL Linuxchecksum
uv-arm-unknown-linux-musleabihf.tar.gzARMv6 MUSL Linux (Hardfloat)checksum
uv-armv7-unknown-linux-musleabihf.tar.gzARMv7 MUSL Linuxchecksum
Verifying GitHub Artifact Attestations

The artifacts in this release have attestations generated with GitHub Artifact Attestations. These can be verified by using the GitHub CLI:

gh attestation verify <file-path of downloaded artifact> --repo astral-sh/uv

You can also download the attestation from GitHub and verify against that directly:

gh attestation verify <file-path of downloaded artifact> --bundle <file-path of downloaded attestation>
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